Make managix scripts properly executable

Most of the scripts managix was using were missing the shebang at the beginning of the script.
This can be problematic if one uses a shell besides bash. This patch fixes that.

Change-Id: Ie7722f832d0d25bec049e123a0ed1570d0aeb650
Reviewed-on: https://asterix-gerrit.ics.uci.edu/286
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Raman Grover <ramangrover29@gmail.com>
diff --git a/asterix-events/src/main/resources/events/backup/backup.sh b/asterix-events/src/main/resources/events/backup/backup.sh
index ec28b59..350e795 100644
--- a/asterix-events/src/main/resources/events/backup/backup.sh
+++ b/asterix-events/src/main/resources/events/backup/backup.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 #/*
 # Copyright 2009-2013 by The Regents of the University of California
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #*/
+
+
 WORKING_DIR=$1
 ASTERIX_INSTANCE_NAME=$2
 ASTERIX_IODEVICES=$3